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Agroforestry Systems

, Volume 89, Issue 1, pp 81–93 | Cite as

Effect of ramial wood amendment on sorghum production and topsoil quality in a Sudano-Sahelian ecosystem (central Burkina Faso)

  • Bernard G. Barthès
  • Aurélien Penche
  • Edmond Hien
  • Philippe Deleporte
  • Cathy Clermont-Dauphin
  • Laurent Cournac
  • Raphaël J. Manlay
Article

Abstract

In Sudano-Sahelian agriculture, organic amendments are often limited by resource availability. Small branches (ramial wood, RW) represent an organic resource found in many landscapes but little is known about their effects. This field trial (2007–2009) studied the effects of RW or straw at low application rate (0.69 Mg C ha−1 year−1) on topsoil carbon (C), nitrogen (N) and available phosphorus (P, Pav), termite cast abundance, and sorghum yield. Straw and RW were chopped and either buried (StBu, WoBu) or mulched (StMu, WoMu). Mineral fertilizers were added to straw so that RW- and straw-amended plots received similar applications of C, N, P, and potassium. Another treatment had RW buried with additional N (WoBuN), and there was a control (Ctrl). Branches came from Piliostigma reticulatum, very common in the area. The treatments had little significant effect on topsoil and crop, owing to the low application rate and spatial variability. However, Pav was significantly lower with buried than mulched amendments in 2009, and decreased significantly over time in Ctrl and with buried amendments. Topsoil C also decreased significantly with time in WoMu. Significantly more termite casts were observed with RW. The sorghum yield averaged 0.87 Mg DM ha−1 in 2007 and then decreased. The treatments affected yield significantly in 2008 only: it was higher in WoBuN and StBu than in Ctrl. In 2009, the yield was mainly affected by initial topsoil Pav. These results suggest that RW stimulated biological activity, leading to P immobilization and C mineralization, but had little effect on yields.

Keywords

Organic amendments Branches Soil carbon Soil phosphorus Termites Tropical dry Africa 

Abbreviations

Ctrl

Control treatment (no inputs)

Pav

Available phosphorus

RW

Ramial wood (small branches)

StBu

Treatment with buried straw

StMu

Treatment with straw mulch

WoBu

Treatment with buried ramial wood

WoBuN

Treatment with buried ramial wood and additional mineral nitrogen

WoMu

Treatment with ramial wood mulch

Notes

Acknowledgments

This work was supported by the joint research unit UMR Eco&Sols (Ecologie fonctionnelle & biogéochimie des sols & des agro-écosystèmes, i.e. Functional ecology & biogeochemistry of soils & agroecosystems; Montpellier SupAgro – Cirad – Inra – IRD), by AgroParisTech, and by the University of Ouagadougou. It was also supported by the Wassa project (Woody amendments for Soudano-Sahelian agriculture) funded by the FP7 – Era ARD (Seventh framework program for research, European research area, Agricultural research for development). We should also like to thank the two anonymous reviewers and Tony Tebby for English correction.

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Bernard G. Barthès
    • 1
  • Aurélien Penche
    • 2
    • 3
  • Edmond Hien
    • 2
    • 4
  • Philippe Deleporte
    • 5
  • Cathy Clermont-Dauphin
    • 1
  • Laurent Cournac
    • 1
  • Raphaël J. Manlay
    • 6
  1. 1.IRDUMR Eco&SolsMontpellier Cedex 2France
  2. 2.IRDUMR Eco&SolsOuagadougou 01Burkina Faso
  3. 3.Société LecofruitTsaralalanaAntananarivoMadagascar
  4. 4.UFR Science de la Vie et de la TerreUniversité de OuagadougouOuagadougou 03Burkina Faso
  5. 5.CiradUMR Eco&SolsMontpellier Cedex 2France
  6. 6.AgroParisTechUMR Eco&SolsMontpellier Cedex 2France

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